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30篇 您的检索式:作者名="Ubaldini"
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1Roasting and chlorine leaching of gold-bearing refractory concentrate:Experimental and process analysis显示文摘This paper deals with gold extraction from a refractory concentrate by chlorine leaching.The process considers a pre-treatment of refractory materials by low temperature oxidation carried out with low oxygen concentration.The oxidized material is treated by leaching with brine.After gold adsorption/reduction onto activated carbon,iron and base metals can be precipitated by NaOH.Roasting tests show the necessity to carry out a thermal pre-treatment at least at 550°C to obtain a reduction of sulfur and mercury in the material(50%and 90%,respectively).Highest gold extraction yield(around 93%)is obtained in the leaching test performed with material sample treated at 650°C.This result confrms the necessity to optimize the thermal pre-treatment to improve Au recovery and to reduce chlorine consumption.A comparison with conventional cyanidation confrms that chlorination could be an useful alternative:in fact,gold extraction yield is quite low:57%in non-pre-treated material and 25%in pre-treatment material.Ida De Michelis Agostino Olivieri Stefano Ubaldini Francesco Ferella Francesca Beolchini Francesco Vegliò 2013International Journal of Mining Science and Technology2013,23,5:10
2Gold recovery from pyrrhotite by bioleaching and ciyanidation: a preliminary study using statistical methods显示文摘Ubaldini S Veglio F Toro L 1995Minerals Biopmcessing Ⅱ1995,,:1
3Biooxidation of arse- nopyrite to improve gold cyanidation: study of some parameters and comparison with grinding 显示文摘Ubaldini S Massidda R Abbruzzese C F 1997International Journal of Mineral Pro- cessing1997,52,1:1
4Application of physical–chemical and biological–chemical methods for heavy metals removal from acid mine drainage显示文摘Alena Luptakova Stefano Ubaldini Eva Macingova Pietro Fornari Veronica Giuliano 2012Process Biochemistry2012,,11:1
5Gold recovery from a refractory pyrrhotite ore by biooxidation显示文摘Ubaldini S Veglio F 2000Int J Miner Process2000,60,:1
6Process flow-sheet for gold and antimony recovery from stibnite 显示文摘Ubaldini S Veglio F Fornari P 2000Hydrometallurgy2000,57,:1
7Biooxidation of arsenopyrite to improve gold cyanidation study of some parameters and comparison with grinding 显示文摘Ubaldini S Vegilo F Toro L 1997Minering Process1997,52,:1
8Preparatory bioleaching to the conventional cyanidation of arsenical gold ores显示文摘Abbruzzese C Ubaldini S Veglio F 1994Minerals Engineering1994,7,1:1
9Combined bio- hydrometallurgical process for gold recovery from refractory stibnite 显示文摘UBALDINI S VEGLIO F TORO L ABBRUZZESE C 2000Minerals Engineering2000,13,1415:1
10Biooxidation of arsenopyrite to improve gold cyanidation:study of some parameters and comparison with grinding显示文摘Ubaldini S Veglio F Toro L 1997Int J Miner Process1997,52,:1
11Process flow-sheet for gold and antimony recovery from stibnite显示文摘Ubaldini S Veglio F Fornari P 2000Hydrometallurgy2000,57,3:1
12An innovative thiourea gold leaching process 显示文摘Ubaldini S Fornari P Massidda R 1998Hydrometallurgy1998,48,1:1
13Biooxidation of arsenopyrite to improve gold cyanidation: study of some parameters and comparison with grinding 显示文摘 Veglio F Toro L 1997International Journal of Mineral Processing1997,52,:1
14Application of physical-chemical and biological-chemical methods for heavy metals removal from acid mine drainage显示文摘Luptakova A Ubaldini S Macingova E 0,,:1
15Development and application of innovative energy dissipation systems in the EC countries - part 2 : electro - inductive energy dissipation and active control of seis- mic vibration of structures 显示文摘Marioni A Silvestri A Ubaldini M 1997Taormina Ittaly1997,,:1
16Raman characterization of powder of cubic RE2O3(RE=Nd,Gd,Dy,Tm,and Lu),Sc2O3 and Y2O3显示文摘Ubaldini A Carnasciali M M 0,,:1
17An innovation gold leaching显示文摘Ubaldini S Fornari P Massidda R 1998Hydrometallurgy1998,,48:1
18Process flow-sheet for gold and antimony recovery from stibnite显示文摘Ubaldini S Veglio F Fomari P 2000Hydrometallurgy2000,57,3:1
19Preparatory bioleaching to the conventional cyanidation of arsenical gold ores显示文摘Abbruzzese C Ubaldini S Veglio F 1994Minerals Engineering1994,7,1:1
20Auto- and heterotrophic acidophilic bacteria enhance the bioremediation efficiency of sediments contaminated by heavy metals 显示文摘BEOLCHINI F DELL'ANNO A de PROPRIS L UBALDINI S CERRONE F DANOVARO R 2009Chemosphere2009,74,10:1
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